FOGBOW Sunlight shining through fog gives rise to a white bow. Fog drops are at least an order of size smaller than raindrops. Rather than splitting the colors into well-defined bands, the small drops create much broader bows that overlap and merge into a ghostlike arc. Only the lens-focusing effect of the drop's surface remains distinct, maintaining the high-intensity white bow. Photo: Courtesy of Christopher Michel on Wikimedia Commons, CC BY 2.0
Image: http://www.scientificamerican.com
